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TOMOYO Linux Cross Reference
Linux/include/linux/if_tun.h

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  1 /*
  2  *  Universal TUN/TAP device driver.
  3  *  Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com>
  4  *
  5  *  This program is free software; you can redistribute it and/or modify
  6  *  it under the terms of the GNU General Public License as published by
  7  *  the Free Software Foundation; either version 2 of the License, or
  8  *  (at your option) any later version.
  9  *
 10  *  This program is distributed in the hope that it will be useful,
 11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 13  *  GNU General Public License for more details.
 14  */
 15 #ifndef __IF_TUN_H
 16 #define __IF_TUN_H
 17 
 18 #include <uapi/linux/if_tun.h>
 19 
 20 #define TUN_XDP_FLAG 0x1UL
 21 
 22 #if defined(CONFIG_TUN) || defined(CONFIG_TUN_MODULE)
 23 struct socket *tun_get_socket(struct file *);
 24 struct ptr_ring *tun_get_tx_ring(struct file *file);
 25 bool tun_is_xdp_buff(void *ptr);
 26 void *tun_xdp_to_ptr(void *ptr);
 27 void *tun_ptr_to_xdp(void *ptr);
 28 void tun_ptr_free(void *ptr);
 29 #else
 30 #include <linux/err.h>
 31 #include <linux/errno.h>
 32 struct file;
 33 struct socket;
 34 static inline struct socket *tun_get_socket(struct file *f)
 35 {
 36         return ERR_PTR(-EINVAL);
 37 }
 38 static inline struct ptr_ring *tun_get_tx_ring(struct file *f)
 39 {
 40         return ERR_PTR(-EINVAL);
 41 }
 42 static inline bool tun_is_xdp_buff(void *ptr)
 43 {
 44         return false;
 45 }
 46 static inline void *tun_xdp_to_ptr(void *ptr)
 47 {
 48         return NULL;
 49 }
 50 static inline void *tun_ptr_to_xdp(void *ptr)
 51 {
 52         return NULL;
 53 }
 54 static inline void tun_ptr_free(void *ptr)
 55 {
 56 }
 57 #endif /* CONFIG_TUN */
 58 #endif /* __IF_TUN_H */
 59 

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